@lex-fmt/lex-wasm

WebAssembly bindings for the Lex language — parser, semantic analysis, formatting, and HTML export running entirely in the browser. No server round-trip, no native dependency.

These bindings expose the same sync feature surface as lexd-lsp (the stdio LSP server), routed through the shared lex-lsp-core crate. Editors that already speak the Language Server Protocol can drive the WASM module via a WebWorker transport instead of stdio.

Install

npm install @lex-fmt/lex-wasm

Usage

import init, { LexDocument } from "@lex-fmt/lex-wasm";

await init();
const doc = LexDocument.new("Section:\n\n    - item one\n");
console.log(doc.format());

The module ships as ESM with TypeScript declarations. Use the web target if you load it directly in the browser without a bundler; this package is built with --target bundler, intended for Vite, webpack, esbuild, etc.

Features

• Parsing and AST inspection (LexDocument.new, toHtml)
• LSP-equivalent providers: semantic tokens, document symbols, hover, goto-definition, references, folding, completion, diagnostics
• Spellcheck against an embedded en_US dictionary (EmbeddedSpellchecker)
• Document formatting (format)

See the main repository for the Lex language reference and editor integrations (VS Code, Neovim, Lexed).

License

MIT — see LICENSE.